package com.itheima.demo;

public class IntegerDemo {
    public static void main(String[] args) {
        Integer i1 = Integer.valueOf(2);
        Integer i2 = Integer.valueOf("3");
        String s1 = "5";
        i1 += 100;
        System.out.println(i1);

        String s2 = i1+"";
        String s3 = String.valueOf(i1);

        int i4 = Integer.valueOf(s1);
        int i5 = Integer.parseInt(s1);
    }
}
